I always get trouble with 3d source alphai do not know which option i have to choose or which one not.i have for example a clip in my mind ,where two people stand,one is far and the other one is really zoomed.From the personwho is really zoomed ,I want to go to the person who is not really zoomed.Like that person is watching over the other person.I really want to learn the possibilties of 3d source alpha><

As Mastamind said, you can easily solve these things by zooming and using layers, 3DSAlpha just enables movement in space, on three axis.

So simply said - if you use a simple zoom, you can just zoom. If you need to move the thing around, rotate it, shake it, 3DSAlpha might be good for that - your video was fine example of what you can do with it, since it moves the whole thing with one layer (I suppose) in which you can have other layers.

sorry for my stupid comment,i already know the mother and the child track,but i thoughtyou have also to click the 3d source alpha option in combinate with the mother/child track.I guess it was unnecessaryT_T.mother/child track was enoughIn case of the cubus,the cubus has 6 parts,one for the top,one for the bottom and six for the sides,but i do not know the degreses for the top,bottom and sides and have troubles with the x y and z option

Here, see for yourself - the edges are kinda rough (I didn't count the stuff exactly) and some stuff would show reversed picture, but you should see from this example how it works. You can turn the cube around by the mother 3D mode in the red layer (most on top-left).It's Vegas Pro 8.0c, so should work for that and higher.

carlyxjack wrote:This is just a practice i just did,just to give an idea of the knowledge i have now abot3d source alpha... and it's not muchhttp://yfrog.com/2m83936381z

That's pretty nice actually Here's a crappy box I made in a couple minutes Nya's box actually came out really good, it should help you a lot (btw I didn't use parent/child for the motion, I rotated it manually).